.page-faq {
  --faq-rail: 268px;
  --faq-gap: clamp(24px, 4vw, 56px);
}

/* ---------- 页头 ---------- */
.page-faq .faq-hero {
  padding-block: clamp(28px, 5vw, 64px) clamp(36px, 6vw, 76px);
  position: relative;
  overflow: hidden;
}
.page-faq .faq-hero__inner {
  display: grid;
  grid-template-columns: 1fr;
  gap: clamp(24px, 4vw, 48px);
  align-items: end;
}
.page-faq .breadcrumb__link {
  color: var(--silver);
  text-decoration: none;
  border-bottom: 1px solid transparent;
}
.page-faq .breadcrumb__link:hover {
  color: var(--cyan);
  border-bottom-color: var(--line-cyan);
}
.page-faq .breadcrumb__item,
.page-faq .breadcrumb__sep {
  font-family: var(--mono);
  font-size: 12px;
  letter-spacing: .06em;
  color: var(--silver);
}
.page-faq .breadcrumb {
  display: flex;
  gap: 8px;
  align-items: center;
  margin-bottom: 20px;
}
.page-faq .kicker {
  margin: 0 0 14px;
}
.page-faq .faq-hero__title {
  font-family: var(--display);
  font-weight: 900;
  font-size: clamp(30px, 5.4vw, 62px);
  line-height: 1.06;
  letter-spacing: -.02em;
  margin: 0 0 18px;
  color: var(--paper);
  max-width: 20ch;
}
.page-faq .faq-hero__intro {
  font-size: clamp(15px, 1.6vw, 18px);
  line-height: 1.75;
  color: var(--paper-soft);
  max-width: 62ch;
  margin: 0 0 26px;
}
.page-faq .faq-hero__quick {
  display: flex;
  flex-wrap: wrap;
  gap: 10px;
}
.page-faq .faq-hero__quick .btn {
  text-decoration: none;
}
.page-faq .faq-hero__media {
  margin: 0;
  border: 1px solid var(--line);
}
.page-faq .faq-hero__media img {
  display: block;
  width: 100%;
  height: 100%;
  object-fit: cover;
}
.page-faq .faq-hero__media .media__caption {
  font-family: var(--mono);
  font-size: 12px;
  color: var(--silver);
  padding: 10px 12px;
  border-top: 1px solid var(--line);
  background: var(--panel);
}

/* ---------- 检索条 ---------- */
.page-faq .faq-bar {
  padding-block: clamp(16px, 2.4vw, 26px);
}
.page-faq .faq-bar__inner {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 16px;
  justify-content: space-between;
}
.page-faq .faq-search {
  display: flex;
  align-items: center;
  gap: 12px;
  flex: 1 1 320px;
  min-width: 240px;
}
.page-faq .faq-search__label {
  font-family: var(--mono);
  font-size: 12px;
  letter-spacing: .12em;
  text-transform: uppercase;
  color: var(--cyan);
  white-space: nowrap;
}
.page-faq .faq-search__input {
  flex: 1 1 auto;
  min-width: 0;
  background: var(--ink);
  border: 1px solid var(--line);
  color: var(--paper);
  font-family: var(--sans);
  font-size: 15px;
  padding: 11px 14px;
  outline: none;
}
.page-faq .faq-search__input::placeholder {
  color: var(--steel);
}
.page-faq .faq-search__input:focus {
  border-color: var(--cyan);
  box-shadow: inset 0 0 0 1px var(--line-cyan);
}
.page-faq .faq-bar__chips {
  flex: 0 0 auto;
}
.page-faq .chip {
  border: 1px solid var(--line);
  background: transparent;
  color: var(--paper-soft);
  font-family: var(--sans);
  font-size: 13px;
  padding: 8px 14px;
  cursor: pointer;
  display: inline-flex;
  align-items: center;
  gap: 8px;
}
.page-faq .chip[aria-pressed="true"] {
  border-color: var(--lime);
  color: var(--lime);
}
.page-faq .chip[aria-pressed="true"]::before {
  content: "";
  width: 6px;
  height: 6px;
  background: var(--lime);
  display: inline-block;
}
.page-faq .chip:hover {
  border-color: var(--cyan);
  color: var(--cyan);
}

/* ---------- 主体栅格 ---------- */
.page-faq .faq-body {
  padding-block: clamp(32px, 5vw, 72px);
}
.page-faq .faq-grid {
  display: grid;
  grid-template-columns: 1fr;
  gap: var(--faq-gap);
  align-items: start;
}

/* ---------- 左侧索引 ---------- */
.page-faq .faq-index {
  border-top: 1px solid var(--line);
  padding-top: 16px;
  position: relative;
}
.page-faq .faq-index__title {
  font-family: var(--mono);
  font-size: 12px;
  letter-spacing: .14em;
  text-transform: uppercase;
  color: var(--steel);
  margin: 0 0 14px;
}
.page-faq .faq-index__list {
  list-style: none;
  margin: 0;
  padding: 0;
  display: flex;
  flex-wrap: wrap;
  gap: 6px 14px;
}
.page-faq .faq-index__item {
  border-left: 2px solid transparent;
}
.page-faq .faq-index__link {
  display: flex;
  align-items: baseline;
  gap: 8px;
  padding: 7px 0 7px 10px;
  color: var(--paper-ink);
  text-decoration: none;
  font-size: 15px;
}
.page-faq .faq-index__num {
  font-family: var(--mono);
  font-size: 12px;
  color: var(--steel);
  letter-spacing: .06em;
}
.page-faq .faq-index__item.is-active {
  border-left-color: var(--orange);
}
.page-faq .faq-index__item.is-active .faq-index__num {
  color: var(--orange);
}
.page-faq .faq-index__item.is-active .faq-index__link {
  color: var(--orange);
}
.page-faq .faq-index__link:hover {
  color: var(--cyan-deep);
}
.page-faq .faq-index__side {
  margin-top: 22px;
  padding: 16px;
  background: var(--ink);
  border: 1px solid var(--line);
}
.page-faq .faq-index__sidetitle {
  font-family: var(--display);
  font-weight: 800;
  font-size: 16px;
  color: var(--paper);
  margin: 0 0 8px;
}
.page-faq .faq-index__sidetext {
  font-size: 13px;
  line-height: 1.7;
  color: var(--silver);
  margin: 0 0 14px;
}
.page-faq .faq-index__sidebtn {
  display: inline-block;
  font-family: var(--mono);
  font-size: 12px;
  letter-spacing: .1em;
  text-transform: uppercase;
  color: var(--lime);
  text-decoration: none;
  border-bottom: 1px solid var(--lime);
  padding-bottom: 2px;
}
.page-faq .faq-index__sidebtn:hover {
  color: var(--cyan);
  border-bottom-color: var(--cyan);
}

/* ---------- 问答流 ---------- */
.page-faq .faq-stream {
  min-width: 0;
}
.page-faq .faq-block {
  padding-bottom: clamp(28px, 4vw, 52px);
  margin-bottom: clamp(28px, 4vw, 52px);
  border-bottom: 1px solid var(--line-soft);
}
.page-faq .faq-block:last-child {
  border-bottom: 0;
  margin-bottom: 0;
}
.page-faq .faq-block .section-head {
  align-items: start;
  gap: 18px;
  margin-bottom: 18px;
}
.page-faq .faq-block .sec-num {
  font-family: var(--mono);
  color: var(--orange);
}
.page-faq .faq-block .sec-body {
  color: var(--steel);
  max-width: 58ch;
}
.page-faq .faq-block.is-active .sec-num {
  color: var(--cyan-deep);
}

/* ---------- 展开组 ---------- */
.page-faq .expand {
  position: relative;
  border-top: 1px solid var(--line-soft);
  padding-left: 0;
}
.page-faq .expand:last-of-type {
  border-bottom: 1px solid var(--line-soft);
}
.page-faq .expand::before {
  content: "";
  position: absolute;
  left: 0;
  top: 0;
  bottom: 0;
  width: 3px;
  background: transparent;
}
.page-faq .expand.is-open::before {
  background: var(--lime);
}
.page-faq .expand__head {
  margin: 0;
  font-size: 1rem;
  font-weight: inherit;
}
.page-faq .expand__btn {
  width: 100%;
  display: flex;
  align-items: flex-start;
  gap: 12px;
  background: transparent;
  border: 0;
  text-align: left;
  padding: 16px 12px 16px 16px;
  cursor: pointer;
  color: var(--paper-ink);
  font-family: var(--sans);
  transition: background-color .18s ease, color .18s ease;
}
.page-faq .expand__btn:hover {
  background: rgba(14, 59, 58, .06);
}
.page-faq .expand__btn[aria-expanded="true"] {
  color: var(--paper-ink);
}
.page-faq .expand__q {
  font-family: var(--mono);
  font-size: 12px;
  color: var(--steel);
  border: 1px solid var(--line);
  padding: 3px 6px;
  line-height: 1;
  flex: 0 0 auto;
  margin-top: 2px;
}
.page-faq .expand__btn[aria-expanded="true"] .expand__q {
  color: var(--lime);
  border-color: var(--lime);
  background: var(--deep);
}
.page-faq .expand__text {
  flex: 1 1 auto;
  font-size: clamp(15px, 1.5vw, 17px);
  font-weight: 600;
  line-height: 1.5;
  min-width: 0;
}
.page-faq .expand__icon {
  flex: 0 0 auto;
  width: 14px;
  height: 14px;
  margin-top: 5px;
  position: relative;
  transition: transform .24s ease;
}
.page-faq .expand__icon::before,
.page-faq .expand__icon::after {
  content: "";
  position: absolute;
  background: var(--steel);
}
.page-faq .expand__icon::before {
  left: 0;
  right: 0;
  top: 6px;
  height: 1px;
}
.page-faq .expand__icon::after {
  top: 0;
  bottom: 0;
  left: 6px;
  width: 1px;
}
.page-faq .expand__btn[aria-expanded="true"] .expand__icon {
  transform: rotate(90deg);
}
.page-faq .expand__btn[aria-expanded="true"] .expand__icon::before,
.page-faq .expand__btn[aria-expanded="true"] .expand__icon::after {
  background: var(--lime);
}
.page-faq .expand__panel {
  padding: 0 16px 20px 44px;
  font-size: 15px;
  line-height: 1.78;
  color: var(--paper-ink);
}
.page-faq .expand__panel p {
  margin: 0;
  max-width: 66ch;
}
.page-faq .expand__panel[hidden] {
  display: none;
}
.page-faq .expand__panel > p + p {
  margin-top: .9em;
}

/* ---------- 字段图示 ---------- */
.page-faq .field-figure {
  margin: 0 0 22px;
  padding: 18px;
  background: var(--ink);
  border: 1px solid var(--line);
}
.page-faq .field-figure__svg {
  display: block;
  width: 100%;
  height: auto;
}
.page-faq .field-figure__caption {
  font-family: var(--mono);
  font-size: 12px;
  color: var(--silver);
  margin: 12px 0 0;
  border-left: 2px solid var(--line-cyan);
  padding-left: 10px;
}

/* ---------- 账号分栏 ---------- */
.page-faq .account-split {
  display: grid;
  grid-template-columns: 1fr;
  gap: 24px;
  align-items: start;
}
.page-faq .account-split__media {
  margin: 0;
  border: 1px solid var(--line);
  order: -1;
}
.page-faq .account-split__media img {
  display: block;
  width: 100%;
  height: 100%;
  object-fit: cover;
}
.page-faq .account-split__media .media__caption {
  font-family: var(--mono);
  font-size: 12px;
  color: var(--steel);
  padding: 10px 12px;
  border-top: 1px solid var(--line);
}

/* ---------- 联系方式 ---------- */
.page-faq .contact-list {
  display: grid;
  grid-template-columns: 1fr;
  gap: 0;
  border-top: 1px solid var(--line-soft);
  margin-bottom: 18px;
}
.page-faq .contact-item {
  display: grid;
  gap: 6px;
  padding: 18px 0;
  border-bottom: 1px solid var(--line-soft);
}
.page-faq .contact-item__label {
  font-family: var(--mono);
  font-size: 12px;
  letter-spacing: .12em;
  text-transform: uppercase;
  color: var(--steel);
}
.page-faq .contact-item__value {
  font-family: var(--mono);
  font-size: clamp(16px, 2vw, 20px);
  color: var(--orange);
  word-break: break-all;
}
.page-faq .contact-item__value a {
  color: inherit;
  text-decoration: none;
  border-bottom: 1px solid transparent;
}
.page-faq .contact-item__value a:hover {
  border-bottom-color: var(--orange);
}
.page-faq .contact-list__hint {
  font-size: 14px;
  line-height: 1.7;
  color: var(--paper-ink);
  margin: 0;
  max-width: 62ch;
}
.page-faq .note {
  margin: 0 0 26px;
}

/* ---------- 下一步卡片 ---------- */
.page-faq .faq-next {
  display: grid;
  grid-template-columns: 1fr;
  gap: 14px;
}
.page-faq .faq-next__card {
  display: block;
  text-decoration: none;
  padding: 18px;
  background: var(--paper-soft);
  border: 1px solid var(--line-soft);
  transition: transform .18s ease, border-color .18s ease;
}
.page-faq .faq-next__card .card__label {
  display: block;
  font-family: var(--mono);
  font-size: 12px;
  letter-spacing: .12em;
  text-transform: uppercase;
  color: var(--cyan-deep);
  margin-bottom: 8px;
}
.page-faq .faq-next__card .card__title {
  display: block;
  font-family: var(--display);
  font-weight: 800;
  font-size: 17px;
  line-height: 1.4;
  color: var(--paper-ink);
  margin-bottom: 8px;
}
.page-faq .faq-next__card .card__body {
  display: block;
  font-size: 14px;
  line-height: 1.7;
  color: var(--steel);
}
.page-faq .faq-next__card:hover {
  transform: translateY(-2px);
  border-color: var(--cyan-deep);
}

/* ---------- 筛选隐藏态 ---------- */
.page-faq .faq-block.is-filtered-out,
.page-faq .expand.is-filtered-out {
  display: none;
}

/* ---------- 响应式 ---------- */
@media (min-width: 720px) {
  .page-faq .faq-hero__inner {
    grid-template-columns: 1.15fr .85fr;
  }
  .page-faq .faq-index__list {
    display: block;
  }
  .page-faq .faq-index__item {
    display: block;
  }
  .page-faq .account-split {
    grid-template-columns: 1.25fr .75fr;
  }
  .page-faq .account-split__media {
    order: 0;
  }
  .page-faq .contact-list {
    grid-template-columns: repeat(3, 1fr);
    gap: 0 26px;
  }
  .page-faq .faq-next {
    grid-template-columns: repeat(3, 1fr);
  }
}

@media (min-width: 1000px) {
  .page-faq .faq-grid {
    grid-template-columns: var(--faq-rail) 1fr;
  }
  .page-faq .faq-index {
    position: sticky;
    top: 96px;
  }
  .page-faq .faq-hero__title {
    max-width: 24ch;
  }
}